58. 21 16 5 11 –6 __ -23    
(A)-17
(B)-13
(C)17
(D)13

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統計: A(492), B(509), C(1146), D(135), E(0) #673663

詳解 (共 1 筆)

#1187893
21-5=16 5-(-6)=11 (-6)-(-23)=17
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